Steps to reproduce:
1) Check out DScanner from https://github.com/Hackerpilot/Dscanner/tree/a5d7bf095607f4b8d9c36a453e96e28aafdc96fe
2) Check out UnicodeData.d from https://github.com/SiegeLord/Tango-D2/blob/b4635847a67faff9480aeb2ff2bbbd23385f38df/tango/text/UnicodeData.d
3) Run the build.sh script in the DScanner folder to compile
4) run "./dscanner --syntaxCheck path/to/UnicodeData.d"
Stack trace:
#0 0x000000000059eba7 in std.format.__T10FormatSpecTaZ.FormatSpec.fillUp() ()
#1 0x0000000000543284 in std.format.__T10FormatSpecTaZ.FormatSpec.__T17writeUpToNextSpecTS3std5stdio4File17LockingTextWriterZ.writeUpToNextSpec() (this=<error reading variable>, writer=...)
at /home/alaran/src/phobos/std/format.d:796
#2 0x000000000054da23 in std.format.__T14formattedWriteTS3std5stdio4File17LockingTextWriterTaTAyaTmTmTAyaTAyaZ.formattedWrite() (_param_6=..., _param_5=..., _param_4=2, _param_3=14778, _param_2=..., fmt=..., w=...)
at /home/alaran/src/phobos/std/format.d:415
#3 0x000000000054d89a in std.stdio.File.__T8writeflnTaTAyaTmTmTAyaTAyaZ.writefln() (this=0x2, _param_5=...,
_param_4=..., _param_3=2, _param_2=14778, _param_1=..., fmt=...) at /home/alaran/src/phobos/std/stdio.d:1101
#4 0x000000000054d80a in std.stdio.__T8writeflnTAyaTAyaTmTmTAyaTAyaZ.writefln() (_param_5=..., _param_4=...,
_param_3=5525528, _param_2=5525528, _param_1=..., _param_0=...) at /home/alaran/src/phobos/std/stdio.d:2527
#5 0x00000000005844c3 in analysis.run.messageFunction() (isError=true, message=..., column=0,
line=140737488345552, fileName=...) at analysis/run.d:27
#6 0x0000000000581912 in stdx.d.parser.Parser.error() (
this=0x5a9608 <std.stdio.File.LockingTextWriter.__postblit()+24>, shouldAdvance=17,
message=0x000000000057884000007ffff7ecaf80) at stdx/d/parser.d:6320
#7 0x000000000057875b in stdx.d.parser.Parser.parseDeclaration() (this=0x2adc6) at stdx/d/parser.d:6307
#8 0x0000000000578030 in stdx.d.parser.Parser.parseDeclaration() (this=0x4) at stdx/d/parser.d:1608
This seems to only be present when DScanner is built with DMD. Building with GDC results in code that completes without segfaulting.